Structural function and disruption of Cohesion in analyzing the role of Divergent Forces from the Iranshahri Government (from the Decline of the Sassanids to the Rise of the Khorasanian movement)

From the middle of the Sassanid period, the function of the divergent forces was more to dislodge the Sassanid system. Power, that is, the Muslims, began, and due to the needs of the Muslims, various political, military, economic, and cultural components of the Sassanid system joined the new system of the caliphate. The conquerors also used short-term and long-term plans to consolidate themselves and weaken the resilience of the Iranshahr government. The question was what was the analysis of the role of the divergent forces from the Iranshahri government in the decline of the Sassanids until the emergence of the Khorasanian movement? In this regard, it is assumed that the divergent forces had a great influence on the economic, political, military, social and religious elements in the fall of the Sassanids and the weakening of the reactions of the Iranians in the post-Sassanid period and the Arab rulers. This research is done using historical methods and by analyzing the structural function in sociology based on the theory of coherence disorder. The findings show that the infrastructure of the Sassanid fall and the continuation of the rule of the Arab governors, in terms of the function of the divergent forces of the Iranshahri government (in this period) in internal and external dimensions and with different methods of action. Despite the narrative and motivational perspectives on the period, the fall of the Sassanids, and the continued lack of government in Iran, originated from numerous sources, mainly formed during the Sassanid period, some of which were strongly encouraged by Arab governors and immigrants. And historical research has been general in nature and at the same time the reasons for its incoherence have been multifaceted.